Ore classifying and sizing mechanism.



J. & F. FRANZ. ORE CLASSIFYING AND SlZING MECHANISM. APPLICATION FILED JULY 28, I916.

1 ,230,697. Patented June 19, 1917.

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WITNESS A TTORNEKS J.& F. FRANZ.

ORE CLASSIFYING AND SIZING MECHANISM.

APPLICATION FILED JULY 2a, 1916.

1,230Q697. Patented June 19, 1917.

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ORE CLASSIFYING AND SIZING MECHANISM.

Specification of Letters Patent.

Patented June 19, 1917.

Application filed. July 28, 1916. Serial No. 111,847.

To all whom it may concern Be it known that we, Josnri-i F ANZ and FRANK FRANZ, residing at Vallace, in the county of Shoshone and State of Idaho, have invented a new and Improved Ore Classifying and Sizing Mechanism, of which the following is a specification.

In milling operations, for. the concentraticn of ores, various methods have been used for sizing different products resulting from crushing, whichsizing is necessary in order to take advantage of difference in specific gravity in the usual methods of separation.

This sizing has been accomplished heretofore, generally with hydraulic classifiers wherein particles of different weights will settle more or less rapidly against a current, or be carried to a greater or less distance by a moving current, advantage being taken in each instance to convey the material to a different destination and thus secure a separation. r

The above mentioned method of operation necessitates an unusually large amount of water and has the added disadvantage of not insuring a posltlve separat1on,1n that the classification varies with small diflerfill all of the desired requirements, since the same requires constant attention, high cost of lip-keep and, considerable first cost.

lVith' the above points in mind, our invention primarily has for its purpose, to pro,- vide a means, in the nature of an improved revolving screen construction, especially de-.

signed for makinga perfect separation of the crushed products, which can be produced at small first costrequires practically no attention, and a minimum of up-keep expense, and which operates to effect the screening of a large volume of mixed sizes in the smallest amountof floor space and head room.

Another and essential object of our invention is the provision, in an improved construction of revolving screen, of means for so effecting the separation and classifying of the material operated on, that it is impossible to get the fine screen material into the coarse by splashing, the construction being such that it permits the taking off of the screen portion with a minimum loss of head.

W'ith other objects in view that will hereinafter appear, our invention consists in certain features of construction and novel arrangement of parts, all of which will hereinafter be fully explained, specifically pointed out in the appended claims and illustrated in the accompanying drawings, in which:

Figure l a side view of our improved revolving screen, parts being broken away and in section.

Fig. 2 is a cross section on the line 22 on Fig. 1.

Fig. 3 is a transverse section of the same taken practically on the line 33 on Fig. 1.

Fig. i is a cross section on the line &--4t on Fig. 1.

Fig. 5 is a side elevation of a portion of the pan and the means for fastening it to the housing.

Fig. 6 is a detail full size cross section of one of the pan edges with the adjustable member hereinafter referred to.

Fig. 7 is a full size .detail cross section on the line 7-7 on Fig. 1.

Fig. 8 is a similar cross section on the line 88 on Fig. 1.

Fig. 9 is a cross section on the line 99 on Fig. 5, and i Fig. 10 is a similar view on line l010 on Fig. l.

' In. carrying out our invention, we provide a revolving screen of special construc tion, that discharges through one end and has the other end formed to constitute a solid head, the said head being inthe nature of a metal disk of suitable diameter, prefer ably 36 inches, and fitted on a revolving shaft that extends lengthwise of the screen,

as will be presently more fully explained.

The screen head is composed of a disk 1 to which is secured a metal spider frame 2 bored and fitted on the revolving shaft 3, the

latter being suitably mounted in end bearings 30, as shown.

4 designates a series of steel rods, square in cross section, whose ends are turned and threaded for being secured to the arms of the spider 2 and the said rods serve as cantalivers to the said'spider arms.

55 designate wooden rims through which the rods 4; pass, one of the said rims bein disposed adjacent the inner face of the disk 1 and the other, at the outer ends of the rods 1, and the said other rim 5 is bolted to a fiat steel ring 6,the manner of securing the said ring to the rim 5 being clearly shown in detail in Fig. 10.

Wood strips 7 are secured upon and are parallel to the square rods 4 and similar wood strips or fillers 8 are secured onto and are parallel with small steel'bands 80 that take around the inner faces of the square shaped rods 4, (see Figs. 3 and 8).

The wooden strips 7 and 8 form the frame work onto which the screen 9 is tacked and in order that the smallest amount of screen surface will be lost, the outer edges of the said strips 7 and 8 are truncated, as shown.

The revolving screen, constructed as stated, is mounted in a housing 10 that in.- closes all except the upper part of the, screen, as is clearly shown in Figs. 1 and 2, by reference to which it will be seen that the said housing has a trough shaped bottom 11 with a discharge for the over size material. Housing 10 at one end has an outlet through which passes the discharging end 12 of the pan 12, the latter being hopper shaped in cross section.

Pan 12 also includes angle irons 13 for conveniently and securely attaching it to the side 10 of the housing, as is clearly shown in detail in Fig. 9.

The pan 12 is made of sheet steel and at each edge it has an adjustable plate 14 adapted to be set closely against the interior of the screen and thereby prevent splash of the screen material and consequent intermixing of the finely screened material with the coarse screenings.

One of the, adjustable plates 14 is shown in detail in Fig. 6.

The screen material is conveyedto its destination through the discharging end or spout 12.

A spray pipe 15 extends transversely of the screen near the upper end thereof and it has its discharging orifices arranged to direct the spray jets through the screening surface across the point where the feed falls onto it. By reason of thus directing the spray jets through the screen and the incoining. pulp, the separation is facilitated.

A curved shield 16 that is placed in the line of the spray, serves to stop the water from, going higher and causes it to fall 7 back upon the screen, thus still further assisting separation.

15 designates a pipe that forms a continuation of the spray pipe 15 to'which it is connected by a return bend. Pipe 15 is pro vided for cleaning out sediment or obstruction in pipe 15-it having a removable screw cap 17, as shown.

We are aware that cylindrical screens haveheretofore been made with the object of doing similar work, but, so far as we know, they have been more or less unsuccessful for the reason that they require too much fallthat is'head room, or did not make clean products, for the reason that the coarse screen material would contain a large per cent. of fines.

In our construction, it is impossible to get the fine screen material inthe coarse, as before stated, and our said construction also permits the taking off of the screen portion with a minimum loss of head.

From the foregoing description taken in connection with the drawings, the complete construction, the manner of use and the advantages of our invention will be readily apparent to those skilled in the art to which my said invention relates.

lVhile the construction of the parts shown and hereinbefore described present a preferred arrangement, it is understood that certain modifications and changes in detail may be made as conditions under which our invention is applied without departing from the generic features of our said invention as set out in the appended claims.

What we claim is 1. In an ore classifier and separator, a

trough-like housing, a horizontally rotatable shaft journaled in bearings in said housing, a separator mounted on said shaft and comprising a screening cylinder, one end of which is closed and the other end is open, means for feeding the material to be separated onto the screen surface at substantially the top of the cylinder, a receiving pan located within the cylinder to receive the material that drops through the cylinder screen, said receiving pan having a discharge spout and projecting through the open end of said cylinder, and means for spraying water outwardly through said screen cylinder adjacent to the place of deposit of the material to be separated and a baflie device over said screen cylinder to deflect the water back onto the exterior of the screen.

2. In an ore classifier, a revolving screen comprising a screen head, aspider for sustaining said head, a series of cantalivers pro jected from said head in circumferential alinement and substantially parallel to the axis of rotation of the screen, a ring secured to the axis of the cantalivers opposite to the head of the screen whereby said end of the screen is open, a screen covering over the said cantalivers and extending between said head and ring, and segmental ring-like filler strips between adjacent cantalivers for sustaining the screen body, said head-and said comprising a screen head, a spider for sushead and ring, and internal ring bands secured to said cantalivers.

l. In an ore classifier, a revolving screen taining said head, a series of cantalivers projected from said head in circumferential alinement and substantially parallel to the axis of rotation of the screen, a ring secured to the axisof the cantalivers opposite to the head of the screen whereby said end of the screen is open, a screen covering over the said cantalivers and extending between saidhead and ring, segmental ring-like filler strips between adjacent cantalivers for sustaining the screen body, said head and said ring being. of greater diameter than the screen body whereby to form side flanges, and internal ring bands secured to said cantalivers.

5. In an ore classifier, a revolving screen comprising a screenhead, a spider for sustaining said head, a series of cantalivers projected from said head in circumferential alinement and substantially parallel to the axis of rotation of the screen, a ring secured to the ends of the cantalivers opposite to the head of the screen whereby said end of the screen is open, a screen covering over the said cantalivers and extending between said head and ring, and segmental ring-like filler strips between adjacent cantalivers for sustaining the screen body, said head and said ring being of greater diameter than the screen body whereby to form said'flanges,

means for depositing the material to be separated on the top of said revolving screen, means for collecting the material that falls from the outside of the screen, and a receiv ingpan projected into the revolving screen for receiving the material that passes through the screen, the longitudinal edges of said. pan engaging said revolving screen along its internal diameter.

6. In an ore classifier, a revolvin screen comprising a screen head, a spider for sustaining said head, a series of cantalivers proj ected from said head in circumferential alinement and substantially parallel to the axis of rotation of the screen, a ring secured to the ends of the cantalivers opposite to the" head of the screen whereby said end of the screen is open, a screen covering over the sald cantallvers and extending between said head and ring, and internal ring-bands secured to said cantalivers, means for depositing the material to be separated on top of said revolving screen, means for collecting the material that drops from the outside of the revolving screen, a receiving pan projected into the revolving screen for receiving the material that passes through the screen, and having longitudinal edges adapted to engage said internal ring-bands.

7.111 an ore classifier and separator, a trough-like housing, a horizontally rotatable shaft journaled in bearings in said housing, a separator mounted on said shaft and comprising a screening cylinder, one end of which is closed and the other end is open, means for feeding the material to be separated onto. the screen surface at substantially the top of the cylinder, a receiving pan located within the cylinder to receive the material that drops through the cylinder screen, said receiving pan having a discharge spout and projecting through the open end of said cylinder, and means for spraying water outwardly through said screen cylinder adjacent to the place of-deposit of the material to be separated and a battle device over said s'creen cylinder to deflect the water back onto the exterior of the screen and onto the adjacent end of the material feeding means. i I

8. In an ore classifier and separator, a trough-like housing, a horizontally rotatable shaft journaled in bearings in said housing, a separator mounted on said shaft and comprising a screening cylinder, one end of which is, closed and the other end is opened, means for depositing the material to be separated onto the screen surface at substantially the top of the cylinder, a receiving pan located within the cylinder to receive the material that drops through the cylinder screen, said receiving pan having a discharge spout and projecting through the open end of said cylinder, adjustable edge plates mounted on said receiving pan and adapted to engage the interior of said screen cylinder, said screen cylinder having internal ring bands to form guides against which said adjustable plates are adapted to be held, and means for spraying water outwardly through said screen cylinder adjacent to the place of deposit of the material to be separated. and a baffle device over said screen cylinder to deflect the water back onto the exterior of the screen cylinder and onto the adjacent end of the material depositing means.

9. In an ore classifier and separator, the combination with the screening cylinder which comprises a skeleton framework, a screen head at one side of said framework, a screen ring at the other side of said framework, and a screen fabric around said framework between said head and ring, the

. collecting diameter of said screen fabric being less than-that of said head and ring whereby to provide projecting flanges, one end of said screening cylinder being closed by said head, the other end being open through said ring, means for depositing material to be sepa? rated on top of said screening cylinder, a receptacle for the material dropped from the outside of said screening cylinder, a receiving pan projected through the open end of said screening cylinder into said screening cylinder for collecting the materials that pass through the screen fabric of said screening cylinder, said screening cylinder including internal ring bands secured to theframe, against which the side edges of said pan are adapted to bear, said ring band serving to maintain said side edges out of engagement with said skeleton frame. j r

10. In an ,orc classifier and separator, a housing having horizontal shaft bearings, said housing having provision for collection and discharge of material, a shaft rotatably journaled in said bearings, a screening cylinder mounted on said shaft and comprising a closed head atone side, an open ring at the other side, and an intermediate cylindrical screen fabric between said head and said ring, cantaliver bars connecting said head and ring and forming internal supports for said screen fabric, ring segments between said cantaliver bars, internal ring bands carried by said bars and segments, a collection pan projected through the open end of said screening cylinder and having divergent walls projected into close proximity with said-internal ring hands, a supply chute for depositing material onto said screening cylinder adjacent to the top of the same, substantially as shown and described.

11. In an ore classifier and separator, a housing having horizontal shaft bearings, said housing having provision for collection and discharge ofmaterial, a shaft rotatably journaled in said bearings, a screening cylinder mounted .on said shaft and comprising a closed head at one side, an open ring at the other side, and an intermediate cylindrical screen fabric between said head and ring, cantaliver bars connecting said head and ring and forming internal supports for said screen fabric, ring segments between said cantaliver bars, internal ring bands carried by said bars and segments, a collection pan projected through the open end of said screening cylinder and having divergent walls projected into close proximity with said internal ring bands, a supply chute for depositing material onto said screening cylinder adjacent to the top of, the same, a water sprayer device projected through the open end of said cylinder in close proximity to the top of the same and in advance of the point of discharge of said supply chute, and

a baffle over the top of said screening cylinder to deflect the water back onto the screen fabric whereby the material will be washed as it falls from the supply chute onto the screening cylinder, substantially as shown anddescribed. x

12. In an ore classifier, a rotatable screening cylinder comprising a rotatable shaft, an end head, a cantaliver framing projecting from said head parallel to the shaft, an open ring on said cantaliver framing opposite the head whereby one end of the screen ing cylinder will be open, said cantaliver framing including longitudinal {bars and ring-like filler bars between said longitudinal bars and internal guide ring bands secured to said bars, means for depositing thematerial to be separated on top of said screening cylinder, a receiving pan projected into said screening cylinder and having its upper edges located in a plane above the axis of rotation of said cylinder and in juxtaposition to said internal ring-bands.

13. In an ore classifier, a rotatable screening cylinder comprising a rotatable shaft, an end head, a cantaliver framing projecting from said head parallel to the shaft, an open ring on said cantaliver framing opposite the head whereby one end of the screen ing cylinder will be open, said cantaliver framing including longitudinal bars and ring-like filler bars between said longitudinal bars and internal guide'ring bands secured to said bars, means for depositing the material tov be separated on top of said screenlng cylinder, a recelvlng pan PI'OjBCtCCl into said screening cylinder and having its upper edges located in a plane above the axis of rotation of said cylinder and in juxtaposition to said internal ring-bands, a water sprayer projected into said screening cylin der adjacent to the top of the same and slightly in advance of the place of deposit of the material to be separated, said sprayer being adapted to'spray the water upwardly through said screen, and abaffie above said screening cylinder designed to direct the water spray back upon the screenings'urface adjacent to the place of deposit of'the material to be separated. V

JOSEPH FRANZ. FRANK F ANZ,

Copies or this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. (3. 

